Although Obamacare sign-ups have fallen significantly this year over skyrocketing monthly premiums, Dr. Mehmet Oz believes enrollment is still too high. Oz, the Trump administration’s top official overseeing the Affordable Care Act, told NBC News that millions of people may be fraudulently enrolled or eligible for other types of coverage. About 23 million people signed up for ACA coverage during this year’s open enrollment period, which ended in January, according to the latest data from the